no grid stopper, anywhere , never 
Even if that were true, it would still be irrelevant as excess noise is usually very frequency-dependent so you can't extrapolate from RF to audio. Note that excess noise usually depends much more on component construction than component materials. Except for faulty components, excess noise is usually quite small so cannot produce major changes in sound.coresta said:
Well, you could not have been speaking of Johnson (thermal) noise as that is completely irrelevant to both antennas and audio wiring and for the same reason: the resistance of an antenna or an audio interconnect is such a tiny fraction of the relevant impedance (radiation resistance or load resistance, respectively) that conductor Johnson noise is also a tiny fraction of the total noise.
Exactly true : i was just talking about bundaries noise of different metals that you can ear with a tiny wire . Did you even try ? 🙄
There is a world of difference between noise caused by loosely scraping one conductor against another, and noise allegedly arising from well-soldered (or welded) junctions. If you were speaking of boundaries why not say, instead of dragging in irrelevant issues like radio antennas? It is difficult to discuss something with someone when they keep changing the subject.
effect is the same ...I can hear scraping noises when I scrape one metal against another. This is probably due to differing work functions (or chemical potential? - SY will correct me).
When I use my FM receiver I hear no scraping noises, despite having a copper coax cable connected to an aluminium antenna.
The effect is the same?
When I use my FM receiver I hear no scraping noises, despite having a copper coax cable connected to an aluminium antenna.
The effect is the same?
No, what you describe is revelant to "battery effect" of different metals, what's the diameter of your alu dipole ?
More likely due to modulation of the actual contact area- that's the principle used for Force Sensing Resistors.
edit: To clarify terminology, chemical potential and Fermi energy are basically the same thing (at least at 0k!). Work function is the difference between the chemical potential and any electrostatic energy of the vacuum at the metal surface due to external fields. It's possible the the noise can result from a combination of the varying and intermittent surface area effect and the fluctuating potentials between dissimilar materials, i.e., the "battery" is being connected and disconnected, modulating the DC.
Not sure - 10-15mm? So what? I thought we were now talking about boundaries, not thickness. Or have we now gone back to 'thicker=better'?coresta said:
Smart...
But by all means go on telling about the sonic properties of the wooden pucks some people put under their amp, and how thick those need be 😀
But by all means go on telling about the sonic properties of the wooden pucks some people put under their amp, and how thick those need be 😀
So I replaced all resistor in my stereo with jelly beans, and let me tell you the results were amazing, night and day even. My wife who was cooking in the next room even noticed and commented right away about how "sweet" it sounded 
SY,
I think you missed some important data. By replacing the dull sounding low quality Metal Film resistor with a carbon composition unit he heard a change. By changing from normal film capacitors to specialty audio grade ones he heard more changes.
I don't understand why you think this is unlikely. I suspect there will be significant measurable differences between the unmodified and modified version.
Now it is even possible that changing the wiring will have a similar effect due to changes in the quality of joints before and after or some such. There even is a distant chance that there is some thermo-electric effect that is significant enough to cause a measurable change.
I suspect that with enough of these kinds of changes a before and after version would easily pass a blind AB test.
I even have a special fuse you can put in a piece of gear that I guarantee will result in a 100% score on a blind AB test. (I am sure you know how to do this also.) 🙂
Yes, every conductor is a resistor, even a fuse 😉 carbon comp behaves unusual : take ANY carbon resistor between you fingers and connect it to a Fluke :then wait a minute or so and look at the reading 😛 Put it under an halogen light and read again 😀
What color jellybeans ? I hope you only used red jelly bellys after all those in the know do but you did not hear it from me.So I replaced all resistor in my stereo with jelly beans, and let me tell you the results were amazing, night and day even. My wife who was cooking in the next room even noticed and commented right away about how "sweet" it sounded
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